diff --git a/README.md b/README.md
index 1a82c6f..f7d56b0 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,17 @@
 
 An MPD client for macOS, written in Swift.
 
+## MP... what?
+
+From the [website](https://www.musicpd.org):
+
+> "Music Player Daemon (MPD) is a flexible, powerful, server-side application
+> for playing music. Through plugins and libraries it can play a variety of
+> sound files while being controlled by its network protocol."
+
+Wikipedia has a [more comprehensive
+description](https://en.wikipedia.org/wiki/Music_Player_Daemon).
+
 ## Setup
 
 Run `bin/setup` before opening the Xcode project.